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Non-equilibrium parameter for a hybrid Fokker-Planck/ DSMC scheme

Hepp, Christian and Grabe, Martin and Hannemann, Klaus (2019) Non-equilibrium parameter for a hybrid Fokker-Planck/ DSMC scheme. In: AIP Conference Proceedings, 2132 (070002). AIP Publishing. 31st International Symposium on Rarefied Gas Dynamics 2018, 23.-27. Juli 2018, Glasgow, Scotland. DOI: 10.1063/1.5119556 ISBN 978-073541874-5 ISSN 0094243X

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Official URL: https://doi.org/10.1063/1.5119556

Abstract

Numerical simulation of hypersonic rarefied gas flows requires modelling of non-equilibrium flow phenomena, like e. g. shock waves. While such non-equilibrium flows can be simulated by the highly accurate direct simulation Monte-Carlo (DSMC) algorithm, computational effort for DSMC increases quadratically with decreasing Knudsen numbers. Therefore it is a common practice to couple DSMC with less accurate, but more efficient flow solvers in areas where the resolution of DSMC is not required. A recent approach for such a flow solver employs the kinetic Fokker-Planck (FP) model. Like in DSMC, the FP model simulates the stochastic motion of a set of particles through the computational domain which suggest a simple coupling of both methods. No collisions must be calculated in the FP approach and so larger cell and timestep sizes than by DSMC calculations can be used. Because of this, the FP model holds the potential to be more efficient than DSMC where Knudsen number is small. Here, a hybridization scheme for the FP and DSMC algorithms is presented.

Item URL in elib:https://elib.dlr.de/119439/
Document Type:Conference or Workshop Item (Speech)
Title:Non-equilibrium parameter for a hybrid Fokker-Planck/ DSMC scheme
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Hepp, ChristianChristian.Hepp (at) dlr.deUNSPECIFIED
Grabe, MartinMartin.Grabe (at) dlr.deUNSPECIFIED
Hannemann, Klausklaus.hannemann (at) dlr.deUNSPECIFIED
Date:5 August 2019
Journal or Publication Title:AIP Conference Proceedings
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
Volume:2132
DOI :10.1063/1.5119556
Editors:
EditorsEmailEditor's ORCID iD
UNSPECIFIEDAIP PublishingUNSPECIFIED
Publisher:AIP Publishing
ISSN:0094243X
ISBN:978-073541874-5
Status:Published
Keywords:Direct Simulation Monte Carlo (DSMC), Fokker-Planck, Hypersonic Flow, Cylinder
Event Title:31st International Symposium on Rarefied Gas Dynamics 2018
Event Location:Glasgow, Scotland
Event Type:international Conference
Event Dates:23.-27. Juli 2018
Organizer:University of Strathclyde
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Transport
DLR - Research area:Raumfahrt
DLR - Program:R RP - Raumtransport
DLR - Research theme (Project):R - Wiederverwendbare Raumfahrtsysteme und Antriebstechnologie
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Spacecraft, GO
Deposited By: Hepp, Christian
Deposited On:23 Nov 2018 09:12
Last Modified:01 Aug 2020 03:00

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